Blower



Aug. 5, 1941. REDMQND v 2,251,553

' BLOWER Filed April 13, 1938 2 Sheets-Sheet'2 Patented Aug. 5, 1941 UNITED. STATES PATENT OFFICE BLOWER H Albert G. Redmond, Flint, Mich. Application April 13, 1938, Serial No. 201,813

4 Claims. (01.230429) This invention relates to certain new and useful improvements in blowers especially adapted to be used inconnection with motor vehicles for blowing air to be used for defrosting the windshield or for causing a circulation of airdnside of the body of a motor vehicle so as to obtain the same temperature throughout the car.

Another object of myinvention is to provide a novel form of blower in which a pair of fan wheels are mounted on the motor shaft, one at each end, each fan wheel being disposed within a fan, chamber having an outlet to which is adapted to be connected a conduit leading to the windshield when the blower is used as a defroster.

Another object of my invention is to provide a. blower comprising a casing so constructed that interchangeable covers can be used, one to be used when the blower is used in connection with r a defroster and the other to be used when the blower is used for causing a circulation of air.

Another object of my invention is. to provide means for controlling the temperature of the air delivered for defrosting purposes in order to prevent the windshield from being broken by forcing very hot air against the same. 4

Another object of my invention is to provide a blower which-is especially adapted to be used in connection with a heater whereby hot air,

warm air and cold air will be mixed together and delivered to the fan wheel chambers so as-to modify the temperature of the air discharged therefrom.

A still further object of the invention is to provide a construction of blower which is exceedingly simple and cheap, the parts being so arranged and mounted that a very compact blower is formed having the desired capacity and yet occupying a very small space, which makes it possible to use the same in connection with motor vehicles, the same being capable of being attached to the dash or disposed on the floor to Figure 1 is a perspective view of my improved 7 Figure 3 is a longitudinal vertical section showing the motor in elevation;

Figure 4 is a top plan view, partly broken arm; 4

Figure 5 is a detail vertical section of the head shown in Figure 6;

Figure 6 is a top plan view ofthe modified form of head to be used in a blower employed for circulating' air within the motor vehicle; and

Figure 7 is a section taken on line of Figure 6.

- In the embodiment of my invention as shown in Figures 1, 2 and 3, I employ a casing I which is closed at its ends by apertured flanged heads 2, said casing being preferably formed of sheet I metal and stamped to provide grooves 3 in which are disposed the edges of aper'tured division plates 4 so as to form a central motor chamber 5 and fan chambers 6 and I to each-side thereof.

- expand'slightiy to position these division plates construction of blower showing the head elevated;

ing the same in position on a dash of a motor vehicle;

andafter they have been placed in position, flanged heads 2- are placed in position to hold the casing rigidly and to lock the plates in their seats. The headsare secured in position on the casing by bolts extending into brackets as clearly shown. The heads ID are provided with outlet collars II and I! at each end in communication with the outlets of the fan wheel chambers 6 "and 'I and to which are adapted. to be connected conduits (not shown) leading to the defrosting type in use, said fan wheels being provided with blades I 8 and the head I! of the wheel is provided with air inlet openings l8 for admitting w the warm air drawn in through the slots II and hot air drawn in through the inlet i9 which is adapted to be connected to the heater of the motor vehicle so that not only hot air but warm air will be drawn in by the fan and discharged through the outlet collars H and" in order to prevent the overheating of the air delivered to the defrosting means. The ends ,2 of thecasing are provided with cold air inlet slots 2' so that I am able to control the temperature or the air delivered to the defrosting means vby predetermining the sizeoi the openings 2', openings l8, slots I2 and the size of the inlet pipe is connected to the heater. It will also, of course. be

understood that the size of the openings of the apertured plates 4 will determine the amount of warm and hot air being drawn in by the tan and delivered to the defroster. The casing is adapted to be secured to the dash by a bracket 20 which is of such a construction that it can be reversed and form means for supporting the casing adiacent the floor 01' a motor vehicle when the device is adapted to be used for circulating air through the body of the vehicle and maintain the temperature in front and back ofthe vehicle at substantially the same temperature.

The hot air inlet I9 is adapted to be connected to a car heater (not shown) by a suitable conduit so that hot air will be drawn through the motor chamber.

When the blower is used for circulating air through the body of the vehicle, the hot air inlet pipe i9 is detached and the bracket 20 is reversed so as to support the casing slightly above the floor oi the vehicle. The cover l having the outlets ii and I2 is removed and a cover 2| substituted therefor as clearly shown in Figures 5, 6 and 7 which is provided with grilledoutlets 22 and 23 for the fan wheel chambers and in this construction the air is drawninto the fan chambers through the inlets at the bottom and at the ends of the fan casing and discharged through the outlets 22 and 23 so as to cause the cold air to be drawn from the floor oi the vehicle and driven to the top to create the proper circulation of airto distribute the hot air being discharged from the heater to all parts of the vehicle. I

It is, of course, understood that the fan wheels could be reversed so as to draw a large percentage of the air through the hot air inlet or through the cold air inlet as desired and that this con- I struction of blower enables its use by simply substituting one head for another for different purposes as by constructing a blower and utilizing a single electric motor and a pair of fan wheels carried by the ends of the motor shaft, I am able to construct a very small blower having a great capacity.

What I claim is:

l. A blower comprising a casing formed of sheet metal having spaced internal annular seats, division plates arranged in said seats forming a central motor chamber and a fan wheel chamber to each side thereof in communication with one another, said i'an wheel chamber being in communication with the atmosphere, said motor chamber being in communication with the source oi hot air, said tan wheel chamber having outlets, an electric motor disposed in said motor chamber and resiliently supported at each end by the division'plates and having a'shaft at each end ex tending to the adjacent fan wheel chamber and a tan wheel disposed in each Ian wheel chambar and secured on each end of said motor shaft for drawing air through said motor chamber and iorcing air out through said outlets.

2. A blower adapted to be used in connection with motor vehicles comprising a casing formed of sheet metal provided with spaced grooves iorming annular seats, division plates seated in said seats provided with apertures forming a central motor chamber and a fan chamber to-each side thereof,'1an wheels provided with peripherally extending blades and a hub at each end arranged in said ian wheel chambers, a motor disposed in the motor chamber having a shaft, the-ends of which extend into said fan chambers and upon which the hubs of said fan wheels are secured, a removable head for said casing having outlets in communication with said fan wheel chamber, said motor chamber having a hot air inlet adapted to be connected to a source of supply.

3. A blower comprising a substantially cylin drical shaped casing formed of sheet metal crimped to form internal annular spaced seats, division plates arranged in said seats, a motor mounted on rubber supports carried by said plates, a fan wheel carried by each end of said motor shaft and flanged heads ior said casing for holding the walls of said casing in engagement with peripheral edges .of said plates to lock said plates in said seats.

4. A blower for mixing air, comprising a casing having a central motor chamber formed by two spaced divisional plates resting in seats stamped in the wall of the casing, a fan wheel chamber iormed by said divisional plates on each side of the motor chamber, a motor within the motor chamber and having its shaft extending from opposite sides into the fan wheel chamber, a fan wheel on each end of the shaft within the chamber, an air inlet in the motor chamber directly below the motor, a grating extending across the entire upper end of the motor chamber, annular spaces in the divisional plates surrounding the motor shaits, air inlets at the end of the casing communicating with the fan wheel chamber, and a restricted air outlet at the upper end of each of the fan wheel chambers.

ALBERT G. REDMOND. 

